Laser myopia surgery is currently the only procedure that is recognized worldwide for myopia treatment. Whether it is Prince Charlie, Woods, Zhang Hui Mei, Liu Qian, etc. in China, they have all undergone this surgery and have maintained good results. All of them have undergone this surgery and have maintained good results. With the continuous development of technology, the use of femtosecond lasers has made myopia correction surgery truly enter the all-laser era. The original laser myopia surgery was performed by a doctor using a laminar knife to cut into the cornea and then ablating the inner cornea with excimer laser LASIK, while the all-laser surgery is performed by a femtosecond laser to create a corneal flap. So what exactly are the advantages of using the femtosecond laser? 1, safer: no laminate knife, avoiding all human factors, but also to prevent the use of a knife in some hospitals more than one person; 2, more accurate: according to the preoperative examination of the relevant data into the computer, the whole computer control, surgery to achieve precision and zero error; 3, adapt more widely: the past due to insufficient corneal thickness and can not use the laminate knife in myopic patients about 10% of people can use femtosecond laser; 4, better results. It is worth noting that the femtosecond laser has very high requirements for pre-operative examinations. In addition to the conventional ophthalmic examination equipment, corneal topography and wavefront aberrometry are also required.